Two nonlinear optical processes in Z-scan curves of a bleached photographic film

E Reynoso-Lara,J A Dávila-Pintle,A Balbuena-Ortega,M D Iturbe-Castillo,Y E Bravo-García,M L Arroyo-Carrasco

doi:10.1186/s41476-016-0015-7

E Reynoso-Lara, J A Dávila-Pintle + Show 4 more

Open Access

https://doi.org/10.1186/s41476-016-0015-7

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Abstract

In this work, the experimental behavior observed in the z-scan curves of a sample of bleached photographic film for different incident powers is theoretically modeled. Two models are modified in order to fit the experimental z-scan curves. The Focal Length Dependent on a power of the beam radius (FLD) model and the Nonlocal (NL) model. As a result of the fitting, it is not possible to fit the experimental results considering only one contribution during the z-scan experiment. The results demonstrated that two contributions were needed to reproduce completely the experimental z-scan curves in both models.

Highlights

In this work, the experimental behavior observed in the z-scan curves of a sample of bleached photographic film for different incident powers is theoretically modeled
Fitting with only one contribution is first presented in order to justify the necessity of considering more than one nonlinear response in the z-scan curve
Fitting with only one contribution Considering the formula (3) for the Focal Length Dependent (FLD) model with specific value of parameters s and as, it was not possible to obtain a good correspondence between numerical and experimental results

Summary

Introduction

The experimental behavior observed in the z-scan curves of a sample of bleached photographic film for different incident powers is theoretically modeled. Methods: Two models are modified in order to fit the experimental z-scan curves. Conclusion: The results demonstrated that two contributions were needed to reproduce completely the experimental z-scan curves in both models. After chemical processing (develop), the latent image turns into a visible negative image A bleached photographic film is a developed photographic film where all the opaque regions are transformed into transparent by another chemical processing. In [10] it was reported that bleached photographic film can exhibit nonlinear optical behavior when is illuminated with cw laser at powers of some milliwatts

Results

Discussion

Conclusion